What Is Skillion Roof - Types, Uses, Advantages & Disadvantages

Skillion Roof: Types, Uses, Design, Pros & Cons

A Skillion Roof is a durable, versatile, and high-performing residential architecture alternative. This type of roof can add sophistication and minimalism to any household, hence making it an incredibly popular selection as a contemporary roof design.

The skillion roof on top has a massive exterior. It has a powerful component in the diagram. The roofs invoke threads of bucolic improvement and processing. It provides eco-friendly insertions, especially solar panels, and skylights.

Read More: 30+ Types of Pitched Roof Truss With Image and Use

What Is Skillion Roof?

The skillion roof is a unique roof consisting of just one isolated unvarying surface. The characteristics are more crucial than the standard smooth tents.

The difference between the standard roof and the skillion roof is the identifiable perpendicular pitch. This roof is generally about a realistic domicile with bright lines and a new demeanor.

The exclusive slope of skillion roofs brings an attractive option for those who appreciate minimalistic elements.

Skillion Roof Home Design
Skillion Roof: Types, Uses, Design, Pros & Cons 9

It has several different identifications allotted by the experts like- Mono-pitched roofs, Lean-to roofs, Shed roofs, and Pent roofs.

In the Victorian periods, the skillion roof was a widely recognized roofing methodology that was maneuvered for home expansions. Despite occurring on a roof, they do not require to be clamped to any element of the roof.

If you have never listened to a skillion roof, here is all you should recognize about this roofing style. A roof design contains only one single flat slope. It is an impressive option for those who adopt the minimalist design.

The single-sloped plane of the skillion roofs is not connected to any additional roof surface, hence making it unique from gable roofs.

These simple-to-construct and different roof designs are widely used in home extensions and outbuildings as they do not need any clamping to a roof fragment.

We can utilize this type of roof for both animals and people as it is told that the skillion roof enables to decrease the temperature by five degrees.

Read More: What is Lean to Roof? How to Build Lean to Roof Structure

Types Of Skillion Roof

As with all design components, skillion roofs have detected some development and change over the years.

Aside from the distinctive single steep pitch, there are two additional outstanding skillion roof types.

  1. Butterfly Roof
  2. Oval Roof
  3. Split Skillion Roof
  4. Multiple Skillion Roof

1. Butterfly Roof

A butterfly roof (also called a V roof occasionally) is a form of roof characterized by an inversion of a standard roof form, with two roof surfaces sloping down the opposing perimeters to a valley near the interior of the roof. It is so named because its shape corresponds to a butterfly’s wings.

Butterfly roofs are generally correlated in the US with 20th-century Mid-century modern architecture. They were also generally used in Georgian and Victorian terraced house architecture of British cities, where they possess alternatively termed “London” roofs.

Butterfly Types Skillion Roof
Skillion Roof: Types, Uses, Design, Pros & Cons 10

The form has not guttered as rainwater can run off the roof in no more than two sites, at either end of the valley, frequently into a scupper or downspout. The form may be equal, with the valley discovered in the center, or asymmetrical with an off-center valley.

The valley itself may be flat, along a central roof cricket diverting water towards the valley ends, or tilting if the whole roof form is inclined toward the one end of the valley.

The roof also enables for higher perimeter walls, with clerestory windows permitting light penetration without affecting privacy.

2. Oval Roof

Oval Skillion Roof
Skillion Roof: Types, Uses, Design, Pros & Cons 11

A curved or oval skillion roof utilizes a smooth curve rather than a steep straight line and sounds a more organic aesthetic.

It may enable a bigger indoor area, even adding another floor where height is limited and is also better naturally protected from the wind.

However, oval roofs are not generally used in residential design as it inclines to have cost-prohibitive.

3. Split Skillion Roof

Split Skillion Roof
Skillion Roof: Types, Uses, Design, Pros & Cons 12

It is becoming outstanding to combine traditional gabled roofing and skillion roofing in an individual home, pertaining to a split-skillion roof.

4. Multiple Skillion Sections

Multiple Skillion Roof Sections
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Designing the several skillion sections at varying heights can also be aesthetically amusing, with a similar impressive look but less of a hit to the budget.

Read More: Gable Roof – Its Types, Components, Pros & Cons

Uses Of Skillion Roof:

The followings are the important uses of the skillion roof:

  • They are a heap, flat sailing, and very rapid while constructing.
  • These roofs allow water drainage as they possess a steeper pitch.
  • These roofs can be personalized according to the customer’s priority.
  • The isolated slope of the skillion roof includes fewer components.
  • These Roofs can be utilized as an expansion.
  • The Skillion roofs enable eco-friendly insertions like solar panels and skylights.
  • These roofs allocate more natural illumination to households because of their lengthy slope.
  • It has a strong diagram component.
  • Skillion roofs elicit bucolic and manufacturing threads.
  • They provide wide outer on top.
  • These roofs last lengthier compared to horizontal caliber roofs.

How To Build A Skillion Roof

1. The Skillion roofs are usually standalone roofs, which indicates they don’t require to be connected to any part of the roof. These roofs are simpler to construct as they don’t have fluctuating pitches or slopes.

2. Some of the major components for building a skillion roof contain metal, asphalt, or wood shingles. The finishing materials can also contain standing seam metal sheets to further safeguard the roof from depletion.

How to Build Skillion Roof
Skillion Roof: Types, Uses, Design, Pros & Cons 14

3. When constructing such a roof, the major consideration you require to take into account is the roof’s degree of pitch and leveling.

You must likewise pay attention to the wind direction to assure the slopes and angle of the roof are sufficient enough to avoid storm damage.

As an added modification, consider metal cladding to obtain the essential rises and falls of the roof.

4. Rafters are one of the greatly important sloping elements that form the skillion roof’s pitch. These are used to give more support to the roof as well as to shift the weight to the structure’s external wall for even additional durability and support.

You may also require a beam to avoid the rafters from failing. This will provide added support along with the length of the rafter.

5. When discussing support beams, it is significant to select the correct thickness and think about the best placement of the beams.

In skillion roofs, wooden beams are usually installed at horizontal 90-degree angles along the rafters. These beams are consumed to strengthen the construction and give additional support to the rafters.

6. Portal frames similarly add to the complicated design of skillion roofs. These frames include a series of trusses that fulfill extra structural support.

Portal frames can be prepared from wood or steel, depending on the level of strength needed in the roof.

What Are The Benefits Of The Skillion Roof?

We are seeing skillion roofs improving in popularity due to their several advantages over the additional roofing types.

1. Better Drainage

With the roof’s stunning steep pitch, water runs off greatly faster and it is minor likely to suffer from drainage difficulties than other roof types might.

While you require to ensure your drainage system and gutters are relevant for this raised water runoff, it is extensively less likely that a skillion roof will leak.

Moreover, the different butterfly skillion roof is an incredibly eco-friendly alternative, with its “wings” and center point making the collection and reuse of rainwater greatly easier.

This is enormous in Australia’s recent drought weather and appeases particular sustainability legislation regarding reusing rainwater for new home builds.

2. More Eco-friendly And Sustainable

 Additional to the simple collection of rainwater from the skillion roof, the sloping angle gives an excellent surface for the installation of solar panels, enabling you to decrease your electricity bills and conserve even more money in the future!

Moreover, these roofs are favorable for skylights to give rise to the maximum of the sun’s natural light during the day and lessen electricity usage.

3. More Affordable

Skillion roofs are simpler, inexpensive, and rapid to build, as they expect fewer materials than conventional gable roofs. This brings low the price of your roof, providing you with a contemporary modern look at a fraction of the expenditure.

4. Aesthetic Dramatic Design

 The particular sweeping steep line of the skillion roof is confident to bring attention to your household from the street, while the rising ceilings inside your home will be a conversation part for several dinner parties to arrive.

5. Privacy From Close Neighbours

You can effectively block out viewpoints into your house by angling the steep gradient of your roof down towards neighbors who have erected it close to one side of your block.

You can accordingly make use of clerestory windows to take in ventilation and light into your room while maintaining your privacy from prying eyes.

6. Longer Lifespan

When designed and constructed correctly with quality materials and by a skilled builder, a skillion roof will give a longer lifespan than a standard flat roof due to the perpendicular angle and cost extensively less in lifetime maintenance.

7. Extensions

Frequently extensions that are added to a property after the unique build makes use of a skillion roof for additional cover. This is another advantage when considering a skillion roof.

Read More: Pitched Roof or Sloping Roof Construction Details & Advantages

Is It Cheaper To Build A Skillion Roof Or A Flat Roof?

When determining the best type of roof for your household or outbuildings, you should ever consider long-term factors, such as the climate conditions and the quality of the material you utilize.

In the case of distinguishing flat roofs from skillion roofs, flat roofs prove as a slightly inexpensive option to build, but they do have more drawbacks than skillion roofs.

The absence of water drainage, for example, is one main drawback to flat roofs, whereas skillion roofs remember a slope that won’t collect water and improve leakage problems.

If you are still undecided about whether to construct a flat roof or a skillion roof, survey the price of the materials as well as the continuous maintenance and repair of flat roofs.

You will accordingly discover that skillion roofs are almost certainly better cost-effective than flat roofs.

Skillion Roof Advantages

1. Better Water Drainage: The skillion roofs can drain water effectively so if you need to avoid leaks, it is a better option for this type of roof over a flat roofing system.

2. Easy To Build: constructing the skillion roof needs few materials and it is simpler to build than other roof styles. However, the formation of this type of roof still needs precision and accuracy.

3. Modern Design: The simple look of skillion roofs is the major reason behind their popularity among people who need minimalist-style roofs. The unique and perfect design of these roofs not just looks attractive but also provides you more freedom to plan your landscaping ideas.

4. Elegant Yet Simple: Thanks to the angled horizontal surface of these roofs, they persuade attention and give an elegant yet simple appeal.

5. Affordable: Skillion roofs are cheap and simple to construct. Their materials are inexpensive, thus formulating this type of roof ideal for those on a particular budget.

6. Longer Lifespan: when constructed using high-quality and durable materials, skillion roofs will give a longer lifespan than flat roofs or straight-gable roofs. Just make sure you utilize weather-resistant materials to resist extreme temperatures.

7. Energy Efficient: because a skillion roof features a slightly sloping angle, it is accurate for putting in solar panels to save energy in the long term.

Skillion Roof Disadvantages

The following are some major disadvantages of Skillion Roofs

1. No Attic Space: One of the extensively notable drawbacks of skillion roofs is their absence of attic space.

If you need additional storage in your roof space, this type of roof design won’t be sufficient for you. The reason for the absence of attic space is due to the roof’s angle being tighter than gable and hip roofs.

2. Prone To Wind Damage: Just like hip and gable roofs, skillion roofs are also vulnerable to high wind or hurricane damage.

To overcome this type of problem, you should consider building many roof slopes to make the main roof stronger. To do this, make sure you employ expert roofers in order to appreciate a longer-lasting roof.

Skillion Roof Variations

There are many variations to skillion roofs, with circular or oval-shaped designs occurring the largely popular.

The circular-shaped roof design possesses a curved structure that uses a soft ridge curve rather than the usual sharp edge.

This skillion roof style is greatly fashionable because of its aesthetic appeal and the capacity to increase the roof’s wind resistance.

Another conventional possibility for a skillion roof deviation is the butterfly skillion, which consists of two sloping panels angling downwards in opposite directions towards the middle of the roof.

The word butterfly refers to the impression of wings that the angled slopes provide. This skillion roof style enables useful rainwater collection, thus making it objective for areas with high rainfall.

The additional popular deviation is the mono-pitched or split skillion roof that combines both skillion and gable roofing designs in one structure.

The mono-pitched deviation includes a single roof that goes in one direction. The split skillion, on the other hand, utilizes two different roofs that are non-intersecting.

Lean-to-skillion roofs are another angled type of flat roof that is generally utilized on unique homes, porches, and sheds.

Skillion Roof Ventilation

  • Skillion roofs are generally thought to pose more difficult because their tight formation and narrow framing cavities give little oppor­tunity for air entry and movement.
  • In fact, research has shown that most skillion roofs in New Zealand have no difficulties, even those that are not gradually ventilated. Where difficulties do occur they can usually be traced to solar-driven moisture, leaks, or construction moisture (wet framing).
  • An incredible amount of air does run through a skillion roof, except perhaps for relatively airtight roofs, such as those clad with long-run trough-division metal roofing, asphalt shingles,  timber shingles with an interleaved (to avoid solar-driven moisture), and membrane-on-plywood roofs.
  • No amount of ventilation will dry out skillion roofs that possess moisture created into them as a result of enclosing wet framing or have moisture penetrating from rain and plumbing leaks or from any interior spaces.

Prevent Moisture Entry From the Spaces Below:

  • Once a skillion roof is finalized and the building occupied, moisture from spaces below must not be enabled to bring into the roof framing cavities.
  • In an occupied building, the air inner is usually warmer and moisture than the air outside because human actions, such as breathing,  heating, and cooking, generate moisture and heat. The study has indicated that this moisture can be transported by airflows throughout gaps, cracks,  penetrations, and open downlights into skillion roof cavities. It is accordingly important that a skillion roof design incorporates directions for preventing this moisture-carrying airflow.
  • Moist air not omitted by air leak­ age, ventilation, or diffusion, continues with the skillion roof structure. In contact with the cold portion of the structure, such as the underneath of the roof covering, the moisture can combine to form water, which can wet insulation and harm materials and finishes or, for membrane roofs, form as bubbles under the membrane.


In conclusion, the skillion roof is a versatile roofing design which offers various advantages and disadvantages and its unique slope design sets it apart from traditional roofs, and it making a popular choice for modern and contemporary architecture. Skillion roofs are commonly used in commercial, residential and industrial building, providing excellent water drainage and easy installation.

The design of a skillion roof allows for effective rainwater collection and making it suitable for areas with heavy rainfall, its simple structures also facilitates natural ventilation and promotes energy efficiency. Additionally, skillion roofs provide a sleek and minimalistic aesthetic appeal and complementing the overall design of modern buildings.


What Is Skillion Roof?

The skillion roof is a unique roof consisting of just one isolated unvarying surface. The characteristics are more crucial than the standard smooth tents.

What are the Types Of Skillion Roofs?

Butterfly Roof
Oval Roof
Split Skillion Roof
Multiple Skillion Roof

What are the advantages of skillion roofs?

Modern aesthetic: They provide a sleek and contemporary look to buildings, making them popular in modern architecture.
Cost-effective: Skillions generally require fewer materials and less labor compared to more complex roof designs, resulting in cost savings.
Easy maintenance: The single slope makes it easier to clean debris and carry out maintenance tasks.
Increased ceiling height: Skillions allow for higher ceilings, providing a sense of openness and spaciousness.

What are the disadvantages of skillion roofs?

While skillion roofs have numerous advantages, there are some drawbacks to consider:
Limited attic space: The slope of skillion roofs reduces the usable attic space, limiting storage options.
Potential for leaks: Skillions may be more prone to leaks if not properly constructed or sealed, particularly at the point where the roof meets the existing structure.
Reduced insulation: Skillions may require additional insulation measures to ensure optimal energy efficiency, as the slope can result in more heat gain or loss.
Aesthetic compatibility: Skillion roofs may not suit every architectural style or blend well with existing structures.

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